Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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732 FZUS51 KBOX 120806 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 405 AM EDT Wed Aug 12 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-122100- 405 AM EDT Wed Aug 12 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... Weak frontal boundaries will traverse the coastal waters through Friday, with little impact outside of scattered showers and thunderstorms. During this time, winds and seas will remain below advisory criteria. This weekend, brief high pressure builds in from the northwest, followed by a low pressure system moving out of the northern Great Lakes late Sunday into Monday, bringing a return to unsettled conditions. $$ ANZ250-122100- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 405 AM EDT Wed Aug 12 2026 .TODAY...NW winds around 5 kt, becoming SE this afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and S 1 foot at 6 seconds. .TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 3 seconds. .THU...SW winds around 5 kt. Seas around 2 ft. Wave Detail: E 1 foot at 2 seconds and SW 1 foot at 3 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 3 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and SE 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and S 1 foot at 7 seconds. .SAT NIGHT AND SUN...SW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-122100- Massachusetts Bay and Ipswich Bay- 405 AM EDT Wed Aug 12 2026 .TODAY...NW winds around 5 kt, becoming SE this afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and S 1 foot at 4 seconds. .TONIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SE 1 foot at 2 seconds. .THU...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 2 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 3 seconds. .FRI AND FRI NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 foot at 3 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and NE 1 foot at 4 seconds. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ231-122100- Cape Cod Bay- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming E this afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 2 seconds and NW 1 foot at 3 seconds. .TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: S 1 foot at 2 seconds and N 1 foot at 3 seconds. .THU...SW winds around 5 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 3 seconds, becoming SW 1 foot at 2 seconds and E 1 foot at 3 seconds. A chance of showers in the afternoon. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds, becoming E 1 foot at 2 seconds and SW 1 foot at 3 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 1 foot at 3 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and N 2 ft at 5 seconds. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-122100- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming NE this afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 6 seconds. A slight chance of showers this morning. .TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and N 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and NW 1 foot at 3 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .THU NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 3 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at 6 seconds. .SAT AND SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and N 3 ft at 5 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ255-122100- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 405 AM EDT Wed Aug 12 2026 .TODAY...NW winds around 5 kt, becoming E this afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 2 seconds. A slight chance of showers. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and N 1 foot at 2 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 6 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and SW 3 ft at 6 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at 7 seconds. .SUN NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-122100- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming W this afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 2 seconds. A slight chance of showers this morning. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and W 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and S 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 8 seconds. .FRI...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and N 1 foot at 3 seconds. .FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and N 3 ft at 4 seconds. .SAT AND SAT NIGHT...N winds 10 to 15 kt, becoming SW 5 to 10 kt. Seas 2 to 4 ft. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ232-122100- Nantucket Sound- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming E this afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and SW 1 foot at 5 seconds. A slight chance of showers this morning. .TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SW 1 foot at 4 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds, becoming SW 2 ft at 3 seconds and SE 1 foot at 3 seconds. A chance of showers in the afternoon. .THU NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 4 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 13 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 7 seconds. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-122100- Vineyard Sound- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming S this afternoon. Seas 1 foot or less. Wave Detail: W 1 foot at 5 seconds and SE 1 foot at 9 seconds. A slight chance of showers this morning. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 2 seconds and SW 1 foot at 4 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 to 3 NM in the morning. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 6 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and N 1 foot at 2 seconds. .FRI NIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and W 2 ft at 4 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-122100- Buzzards Bay- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming S this afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 2 seconds and W 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 4 seconds. .THU...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 8 seconds, becoming S 2 ft at 4 seconds and SE 1 foot at 8 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 5 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and W 1 foot at 5 seconds. .FRI NIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 6 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-122100- Rhode Island Sound- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming S this afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and NW 1 foot at 4 seconds. A slight chance of showers this morning. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 2 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 6 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and N 1 foot at 2 seconds. .FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and S 2 ft at 6 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-122100- Block Island Sound- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming SW this afternoon. Seas around 2 ft this morning, then 1 foot or less. Wave Detail: S 2 ft at 5 seconds and NW 1 foot at 4 seconds, becoming N 1 foot at 2 seconds and S 1 foot at 5 seconds. A slight chance of showers this morning. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 4 seconds, becoming W 1 foot at 2 seconds and S 1 foot at 2 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and SW 1 foot at 4 seconds. .FRI NIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and NW 2 ft at 3 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-122100- Boston Harbor- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming SE this afternoon. Waves 1 foot or less. .TONIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. .THU...SW winds around 5 kt. Waves 1 foot or less. A chance of showers in the afternoon. .THU NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .FRI...NW winds 5 to 10 kt. Waves around 2 ft. A chance of showers in the afternoon. .FRI NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .SAT THROUGH SUN...SW winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...S winds 10 to 15 kt. Waves around 2 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ236-122100- Narragansett Bay- 405 AM EDT Wed Aug 12 2026 .TODAY...N winds around 5 kt, becoming S this afternoon. Waves 1 foot or less. .TONIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. .THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft. .FRI...N winds around 5 kt, becoming W in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .FRI NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-122100- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 405 AM EDT Wed Aug 12 2026 .TODAY...NW winds around 5 kt, becoming SW this afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 6 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 3 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 3 seconds. .FRI...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 3 seconds. .FRI NIGHT...NW winds 10 to 15 kt, becoming N after midnight. Gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: N 5 ft at 8 seconds and NW 4 ft at 5 seconds. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT NIGHT AND SUN...W winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ281-122100- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 405 AM EDT Wed Aug 12 2026 .TODAY...NW winds around 5 kt, becoming NE around 5 kt this afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. A slight chance of showers this morning. Patchy fog this afternoon with vsby 1 NM or less. .TONIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and NW 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 10 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and N 3 ft at 5 seconds. .SAT AND SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: N 5 ft at 6 seconds and N 4 ft at 6 seconds. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-122100- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 405 AM EDT Wed Aug 12 2026 .TODAY...W winds around 5 kt, becoming N this afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and N 1 foot at 2 seconds. A chance of showers, mainly this morning. .TONIGHT...W winds around 5 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 6 seconds and E 1 foot at 3 seconds. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: N 4 ft at 5 seconds and SW 3 ft at 6 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at 7 seconds. .SUN NIGHT...SW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ283-122100- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 405 AM EDT Wed Aug 12 2026 .TODAY...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 2 seconds. A chance of showers, mainly this morning. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and N 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 8 seconds. .FRI...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and N 3 ft at 5 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston